1. NOTICES BEFORE MAKING ADJUSTMENT OR REPLACEMENT AVR – AUTO VOLTAGE REGULATOR For your safety, do not use your bare hands to operate while the alternator is operating or touch the area of ​​the auto voltage regulator that may cause slight shock. Please read the supplier’s manual carefully and use insulated gloves and screwdrivers when adjusting voltage. … 2. GENERAL INFORMATION OF MECC ALTE AVR – AUTOMATIC VOLTAGE REGULATOR. The DSR’s voltage correction controller uses a 10kOhm potentiometer, the DER1’s is 100kOhm +-14% oscillator, or the 25kOhm type with a 3.9 Ohm resistor in series +-7% correction. One of the best automatic voltage regulator of Mecc Alte alternator has 2 versions of the AVR: DSR (white base type) is used for Prime power < 400kVA and DSR/A (blue base type) is used for > 400kVA. DER1 (white base type) is used for Prime power < 800kVA and DER1/A (green base type) is used for 800kVA – 2800kVA. The new AVR (ac automatic voltage regulator) may not have a pre-installed voltage, so when you buy a new item, you must check and install it yourself or ask the help of TTTT team to complete the installation. The adjustment position is the screw marked on the surface of the new AVR including the labels named “VOL” (voltage), “Hz” (Frequency), “AMP” (Amperage). Before using, you should use the screw to turn the screw counter-clockwise all the way. Because the new AVR, failing to do so may affect the auxiliary load and connected equipment. Each Mecc Alte alternator has corresponding parameters suitable for the customer’s application, and this parameter is printed on the nameplate of the product and on the Test report of the issuing company to help customers easily recognize and control. Adjust the numbers accordingly. For more information, you can contact TTTT for advice and support. 3. AVR – AUTO VOLTAGE REGULATOR ADJUSTMENT Based on the parameters on the label of the alternator and the company’s Test report so that we can adjust the parameters for accuracy. For example for 3 phase alternator, 400V, 50Hz, 1500Rpm. 3.1. Adjust the voltage 3.2. Overload protection adjustment 3.3. AVR Under-speed protection adjustment

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